Ullom, Stephen V.
University of Illinois at Urbana-Champaign. Algebraic Number Theory, Galois Module Structure.

Ulmer, Douglas
University of Arizona. Director of the Southwestern Center for Arithmetical Algebraic Geometry.

Urban, Eric
University of California Los Angeles. Automorphic forms and number theory.

Ueda, Masaru N.
Nara Women's University. Modular forms. Papers, preprints.

Umegaki, Atsuki
Sophia University. Arithmetic of elliptic curves. Papers, CV.